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  • 1980-1984  (5)
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Keywords
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Years
Year
  • 1
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    Relationship between fluorescence and antioxidant activity of ethanol extracts of a maillard browning mixture (1983)
    Wiley
    Details
    Publication Date: 1983-01-01
    Print ISSN: 0003-021X
    Electronic ISSN: 1558-9331
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Published by Wiley
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    PAPER CURRENT
  • 2
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    Effect of hindlimb immobilization on the fatigability of skeletal muscle (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The effect of 6 weeks of disuse atrophy produced by hindlimb immobilization was studied in situ (33.5 C) in the soleus and extensor digitorum longus muscles of rats. The results indicate that disuse causes preferential alterations in the isometric contractile properties of slow-twitch, as opposed to fast-twitch, skeletal muscles. During continuous contractile activity, atrophied muscles were found to have lower ATP levels and an apparent increase in their dependence on anaerobic metabolism, as reflected by the more extensive depletion of glycogen and enhanced lactate formation. Although the atrophied muscles were determined to have fewer cross bridges and thus generated lower tension, the pattern of decline in active cross-bridge formation and tetanic tension during contractile activity was found to proceed in a manner similar to controls.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology (ISSN 0161-7567); 54; May 1983
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Effect of disuse on sarcoplasmic reticulum in fast and slow skeletal muscle (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The effect of 6 weeks of hindlimb immobilization on rat skeletal muscle sarcoplasmic reticulum (SR) was determined in the slow-twitch, type 1 soleus (SOL), the fast-twitch, type 2A deep region of the vastus lateralis (DVL), and the fast-twitch, type 2B superficial region of the vastus lateralis (SVL). Immobilization produced a significant decline in the Ca(2+) uptake rate (V sub max) of SR vesicles from the slow SOL, while the SR V sub max increased in the fast SVL and was unaltered in the DVL. Vesicles from the fast SVL and DVL also exhibited a higher total Ca(2+) uptake capacity following immobilization. An evaluation of the time course of the immobilization-mediated effect revealed an increased Ca(2+) uptake capacity in all three samples after 1 wk. In the SOL total Ca(2+) uptake returned to control level after 2 wk, while in the fast-twitch muscles the higher capacities were maintained. The Ca(2+)-stimulated SR ATPase activity was not altered in any of the muscle studies.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: NASA-CR-174337 , NAS 1.26:174337
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Hindlimb immobilization - Length-tension and contractile properties of skeletal muscle (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Casts were placed around rat feet in plantar flexion position to immobilize the soleus muscle in a shortened position, while the other foot was fixed in dorsal flexion to set the extensor digitorum longus in a shortened position. The total muscular atrophy and contractile properties were measured at 1, 2, 4, 7, 14, 21, 28, 35, and 42 days after immobilization, with casts being replaced every two weeks. The slow twitch soleus and the fast-twitch vastus lateralis and longus muscles were excised after termination of the experiment. The muscles were then stretched and subjected to electric shock to elicit peak tetanic tension and peak tetanic tension development. Force velocity features of the three muscles were assayed in a series of afterloaded contractions and fiber lengths were measured from subsequently macerated muscle. All muscles atrophied during immobilization, reaching a new steady state by day 21. Decreases in fiber and sarcomere lengths were also observed.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Journal of Applied Physiology: Respiratory; vol. 53
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Recovery time course in contractile function of fast and slow skeletal muscle after hindlimb immobilization (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The present study was undertaken to characterize the time course and extent of recovery in the isometric and isotonic contractile properties of fast and slow skeletal muscle following 6 wk of hindlimb immobilization. Female Sprague-Dawley rats were randomly assigned to an immobilized group or a control group. The results of the study show that fast and slow skeletal muscles possess the ability to completely recover normal contractile function following 6 wk of hindlimb immobilization. The rate of recovery is dependent on the fiber type composition of the affected muscle.
    Keywords: LIFE SCIENCES (GENERAL)
    Type: Journal of Applied Physiology: Respiratory; vol. 52
    Format: text
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    NASA TECHNICAL REPORTS
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